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You need to include the DLL as content in your project so it is include with and deployed in the appx package. Copying it to the executable folder isn't sufficient since that is just a template folder and not where the app will actually run from.

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You need to include the DLL as content in your project so it is include with and deployed in the appx package. Copying it to the executable folder isn't sufficient since that is just a template folder and not where the app will actually run from.